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在潮湿或高温或有导电灰尘的场所,实验时应该降低电压供电。
社会生产力的发展是教师职业形成的必要条件。
It is generally accepted that ______ boy must learn to stand up and fight like ______ man.
用作消毒灭菌的氧化剂有()
急性心肌梗死出现无脉性室性心动过速时,治疗首选()
下列关于国务院反垄断执法机构对经营者集中进行审查的说法正确的有()。
铜绿山矿冶遗址的发掘填补了我国冶金史的空白,铜绿山矿冶遗址发现于()。
()在进站道岔外方线路上施工,对车站方向,以关闭的进站信号机防护。
下列关于资产负债表日后事项的表述中,正确的是( )。
下列不属于现代气压沉箱工法的优点的是()。
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Which signal is recognized as a distress signal?()
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